Artists ranging from Green Day, Lady Gaga, the Strokes, Phoenix, AFI, Jimmy Cliff, the Black Keys, Metric, the Arcade Fire, the National, Spoon, DEVO, Stars, Raphael Saadiq, Dragonette, Neon Trees, MGMT, Yeasayer, Grizzly Bear, Blues Traveler, Soundgarden & many more, played to approx. 270,000 concert goers this past weekend in Chicago's Grant Park.
